| 摘要 |
The invention is based on water aeration devices, especially for waste waters, having a distributor pipe serving for the infeed of the air and supporting pipes connected thereto which are provided with a perforated rubber cover for the air to escape into the water. In order to preclude leaks, especially at the junction point between the distributor pipe and the supporting pipe, if the latter vibrates or performs angular movements, an annular rubber seal is provided according to the invention between said pipes, which has an elastically pre-tensioned projection located between the two pipes and additionally with its outer faces bears on the inside of the supporting pipe and on the inner face of the connection bore of the distributor pipe.
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